Event: Rapidplay

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Opponent Rating Result
Barbara Newcombe 83 0 - 1
Joe Cunningham 99 0 - 1
Joe Cunningham 99 0 - 1
Barbara Newcombe 83 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-309 = (364 + 400 * (0 - 4)) / 4)

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